Why are twist ties still used on bread bags?

We know that most food packaging uses zipper seals, so why do many bread bags still use twist ties? Is it just about cost?

Certainly not. Beyond price, there are considerations such as breathability (for certain types of bread). Here are four reasons summarized below:

1、Extremely low cost:

A plastic or paper twist tie costs only a fraction of a cent, making it one of the cheapest components in packaging.

In contrast, zipper seals require more complex manufacturing processes, as a plastic zipper must be heat-sealed onto the bag, which is significantly more expensive. For large-scale producers who manufacture millions of bread bags daily, this cost difference is substantial.

2、Suitability for high-speed automated production:

Bread production lines operate at very high speeds. Twist tie sealing equipment is simple, efficient, reliable, and has a low failure rate.

Zipper seals require more precise machinery to ensure accurate alignment and sealing. At extremely high production speeds, this can lead to malfunctions and reduced efficiency.

3、Suitability for "single-use" scenarios:

Many households transfer bread from its original bag to a bread box or other container after purchase, discarding the original packaging. For such usage habits, a simple, disposable sealing method is sufficient.

4、Breathability considerations (for certain bread types):

Some breads, like baguettes or artisanal loaves, need to "breathe." Complete sealing can cause the crust to soften and lose its crispness. Twist ties allow for minimal air exchange, which can actually be beneficial in these cases.

Therefore, the use of twist ties on bread bags is the optimal solution based on comprehensive considerations. For high-end products like toast and snacks that require better freshness and sealing, zipper seals are more commonly adopted.